Grok Imagine video

grok-imagine-video-1.5 — text-to-video with optional reference images, billed per output second, on the same asynchronous task API as Seedance.

grok-imagine-video-1.5 is xAI's video model, served over the same asynchronous task API as Seedance but with its own request contract. It is text-to-video with optional reference images: there are no first / last frames, no reference video or audio, and no asset library. It is served by the Grok 视频 plan group; a key bound to that group can call it.

Parameters

Parameter	Description
`model`	`grok-imagine-video-1.5` (required, exact)
`prompt` or `content`	One is required. `content` accepts `text` elements only — an `image_url`, `video_url`, or `audio_url` element is rejected at submission
`resolution`	Required, unlike Seedance. `480p`, `720p`, or `1080p`. There is no 4K tier
`duration`	Optional integer 1-15 seconds. `-1` (automatic) is not accepted. Omit it and HopBase sends nothing, leaving the upstream default in force
`aspect_ratio`	Optional: `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`. Note the field name — Seedance's `ratio` is rejected here, and `21:9` and `adaptive` are not supported
`reference_images`	Optional top-level array of `{ "url": "https://..." }`. URLs must be publicly reachable http(s); `data:` base64 and `asset://` IDs are not accepted

generate_audio, watermark, return_last_frame, frames, seed, camera_fixed, and draft are rejected at submission rather than silently dropped, so a request never appears to have taken effect when it did not.

curl https://api.hop-base.com/v1/video/generate \
  -H "Authorization: Bearer sk-your-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-imagine-video-1.5",
    "prompt": "An orange cat runs across sunlit grass as the camera follows",
    "resolution": "720p",
    "duration": 5,
    "aspect_ratio": "16:9"
  }'

Poll the returned task ID exactly as you would a Seedance task, with GET /v1/video/tasks/{task_id}. status is pending, processing, completed, or failed; treat any non-terminal value as still running. A completed task carries duration_seconds and HopBase relay URLs in outputs. Grok tasks report no token usage and never return last_frame_url.

Video is served by the Grok 视频 plan group, separate from the Grok 全系 group that serves chat and image. A key bound to one does not reach the other. For the Grok chat, reasoning, and image models — including long-context pricing, reasoning-token billing, and server-side tool charges — see Grok.

Rates

Official list prices are on the pricing page. Your own rate is the one shown in the signed-in model catalog, and each request's actual charge is in your usage record.

Parameters

Group and related pages

Rates

On this page